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http://nopr.niscpr.res.in/handle/123456789/18040| Title: | Liquid phase preparation of catalysts used in slurry reactors to synthesize dimethyl ether from syngas: Effect of heat treatment temperature |
| Authors: | Gao, Zhihua Yin, Lihua Jia, Qin Huang, Wei |
| Keywords: | Catalysts;Liquid phase catalysts;Slurry catalyst;Dimethyl ether;Syngas |
| Issue Date: | May-2013 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | The CuZnAl slurry catalysts have been prepared by a complete liquid phase technology and characterized by X-ray diffraction, H2 temperature-programmed reduction and temperature-programmed desorption of ammonia. The activity of the catalysts for direct synthesis of DME from syngas is evaluated in a slurry reactor. The structure and performance of the catalysts under different heat treatment temperatures are investigated. The results indicate that the phase of copper species, reducibility of catalysts and acid distribution are affected by the heat treatment temperature. Moreover, the catalyst heat treated at 513 K shows the smallest crystal size of Cu, good dispersion, more weak acidic sites and larger amount of stable Cu2O species. In the DME synthesis reaction, it is found that the effect of heat treatment temperature on the catalytic activity is depended strongly on the ratio of Cu0/Cu+ and the proportion of weak acid sites in the catalyst. The catalyst shows maximum activity at 513 K. |
| Page(s): | 608-613 |
| ISSN: | 0975-0975(Online); 0376-4710(Print) |
| Appears in Collections: | IJC-A Vol.52A(05) [May 2013] |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| IJCA 52A(5) 608-613.pdf | 232.04 kB | Adobe PDF | View/Open |
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